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ID:33362267
大小:1.61 MB
页数:70页
时间:2019-02-25
《聚乙烯醇吹塑薄膜的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中北大学学位论文StudyofPVAblowmoldingFilmChenLaipengJiaRunliAbstractAlongwiththedevelopmentofmodemplasticpackingprofession,methodofproductionandstudyonPVAfilmismainlyusingextrusionandblowmoldingprocess.Atpresent,thestudyofPVAblowmoldingfilmisfilmisblowoutafteraddingplasticizertoPV
2、A,thenanalyzedtheinfluenceofplasticizerOnperformanceofPVAfilm.Inthispaper,underthepremiseofmaintainingcertainmechanicsperformanceofPVAfilm,PVAfilmisstudiedafteraddingdifferentratios’TDIandglycerin,andtheinfluenceofdifferentratios’TDIandglycerinonmechanicalpropertiesisinves
3、tigated.Atthesametimeplasticizedmechanismofglycerinandcross—linkedmechanismofTDIindifferentsystemsisstudied.Astoglycerin,therearedifferentplasticizedmechanismsindifferentsystems,yetglycerinalwaysplasticizethesystemwhichcontainglycerin,Whenthecontentofotheringredientsinsyst
4、emareunvaried,withglycerinincreasing,tensilestrengthandtearingstrengthofPVAblowmoldingfilmreduce,butbrokenextendingrateincreases.Forexample(takethecrosswisedataasexample):whenPVAislkg,andTDIislml,thecontentofglycerinincreasefrom3009to4509,thetensilestrengthPVAblowmoldingfi
5、lmdeducefrom53.29MPato41。27MPa,thetearingstrengthofPVAblowmoldingfilmdeducefrom184.48MPato152.8MPa,andbrokenextendingrateofPVAincreasefrom291,35%to421.05%.AstoTDI,therearedifferentcross-linkedmechanismsindifferentsystems,yetitingeneralhascross—linkedperformance.Andwhenthec
6、ontentsofothersingredientsinsystemareunvaried,withthecontentofTDIincreasing,tensilestrengthandtearingstrengthofPVAblowmoldingfilmincreasefirst,Afterwardsitreduces;andbrokenextendingrateofblowmoldingfilmreducesfirst,afterwardsitincreases.Forexample:whenPVAcontentislkg,andgl
7、ycerincontentislml,EVOHcontentis409,withthecontentofTDIincreasefrom中北大学学位论文0.5mlto2.5m1.thetensilestrengthPVAblowmoldingfilmincreasefrom35.45MPato41.14MPathenreduceto39.71MPa,thetearingstrengthofPVAblowmoldingfilmincrease行om147.47MPato158.14MPathendeduceto143.78MPa.andbrok
8、enextendingrateofPVAdedueefrom462.18%t0371.68%thenincreaseto424.27%.Therelationshipbetwee
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